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Thoughts on science & perception

During a recent forum discussion about bike sizes, stem length and test rides, Josh Poertner of Silca added a few thoughts on science and perception.

Rim Widths 2014

We update our big rim width database for 2014. New for this year - not only are outside rim widths listed, but also internal widths for clincher rims. Read on for all of the details.

Are your wheels ready to race?

What length valve stem are you using? Removable cores? What kind of sealant? What kind of extender is on your wheels? And your spares? This and more in this installment of Things That Roll.

Valve Stems and Extenders

Extender: one of the few words rhyming with "ender" that is not in Jackson Browne's "The Pretender". This winds Kopecky's how-to into a race-prep chapter in "Things that Roll".

Things that roll

In a week-long series we'll talk about wheels, tubes, tires, how to choose them, prepare them, acclimate yourself to them, and get the most out of them during the race. We begin with a discussion of ...

Speed Concept brake tips

We give you a step-by-step guide on how to properly service rear brakes on the Trek Speed Concept triathlon bike, including a few pro tips and tricks.

Barry Roubaix Recap

We follow up on our intro to gravel racing with a short video, recap, and race report from the 2014 Barry Roubaix Killer Gravel Road Race. We talk tires, gearing, and more.

Run shoes in 5 years

In the series wrap I'll predict what run shoes will be like in 5 years, features that will advance and recede, and possible changes in the trajectory of several leading companies.

Run shoe levers and footbeds

Running has never seen this kind of divergence in technologies and theories, from barefoot all the way to hyper-structure and custom footbeds. And everything in between.

Future of Run Footwear

The features that matter in technical running footwear are different now than they were a decade or two ago. That's a good thing. Footwear is going to look a lot different in 5 years.

New run technologies

The king (minimalist running) is dead. Long live the king (supportive running). This is the first of a series on how new running technologies will transform foot and lower body extremity health.

Gravel Bike Details

We provide an overview of a relatively new category of bikes: Those purpose built for gravel roads and gravel racing. What makes them unique? Do you want one?

Slowtwitch Mailbag - 10

We answer more reader questions in our Slowtwitch Mailbag. On tap for this week, have some very interesting information on custom paint, along with a practical query on aero positions.

Your ideal winter kit - 2

This is part two of our series on winter riding. As we transition in to Spring, how should your equipment change? We discuss the particulars of bike choice, tire choice, and other details.

Your ideal winter kit

With such a cold winter, we take a look at some tips for riding your bike comfortably. How do you layer? What are the best gloves? Is it possible to stay warm?

Cassette Evolution

We take a detailed look at cassettes and how they have evolved over the years. With new 11-speed systems, has anything really changed? Where is it going?

Slowtwitch Mailbag – 9

We open up the Mailbag once again to answer questions from our readers. This week covers stack and reach, tire choice, and some curious particulars of race strategy.

Crank Length and Gearing

We examine bicycle crank arm length and the way it influences gear ratio. Should your chainring and cassette sizes change along with your crank length? Let’s find out.

Low Profile top caps

Tall headset top caps are my great while whales. I don't want to eliminate them, just cut them down to size. John Cobb to the rescue.

Slowtwitch Mailbag - 8

Our Mailbag covers two new questions. First, how does GPS work? Next, how many calories or carbohydrates should you take in during an Ironman or 70.3? For more, read on.

Definition of Fast

We clear up some common misconceptions about what the word ‘fast’ means in terms of your wheels and tires. Does it mean aero? Does it mean light? Let’s talk details.

Road wheel basics

We take a bird's eye look at the anatomy of road and triathlon wheels. What are all of the different parts? What should you look for when making a purchase? For more, read on.

Slowtwitch Mailbag - 7

This edition of the Mailbag covers two questions. First, why does my GPS show a different distance than the published race course? Next, how much speed can I gain from a new bike?

Hub Service 2.0

We cover in-depth service on rear hubs with shouldered axles, such as Renn discs and FLO Cycling. While not the easiest service, it can be done with the right tools and some time.

Mavic hub How-To

We show you the standard service procedure for common 2013 Mavic rear hubs. It applies to wheels like the CXR series, R-Sys, Ksyrium, Cosmic Carbone, and Comete disc.
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